Small footprint, high-performance silicon capacitive accelerometer with a 3-D process

F. Maspero 1, * S. Delachanal 1 A. Berthelot 1 L. Joet 1 G. Langfelder 2 S. Hentz 1
* Corresponding author
1 CEA-LETI - Laboratoire d'Electronique et des Technologies de l'Information
2 Polytechnic University of Milan
Abstract : A new process for multi-layer MEMS is presented and demonstrated with an in-plane accelerometer. With this solution, sensing elements (here, comb-fingers) and seismic mass can be fabricated in different layers and located on top of each other for a significantly reduced footprint and enhanced performance: both can be independently optimized. For this first demonstration, we show an intrinsic noise floor of 7 mu g/root Hz, mechanical stiffness of 20 N/m, large bandwidth and a sensitivity of 5.3 fF/g with a total footprint of 400 mu mx600 mu m.
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Submitted on : Thursday, July 18, 2019 - 11:27:51 AM
Last modification on : Saturday, July 20, 2019 - 1:25:33 AM

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F. Maspero, S. Delachanal, A. Berthelot, L. Joet, G. Langfelder, et al.. Small footprint, high-performance silicon capacitive accelerometer with a 3-D process. 31st IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Jan 2018, Belfast, Ireland. pp.109-112. ⟨cea-02188043⟩

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